JPH05156721A - Joining method of precast reinforced concrete plate member - Google Patents

Abstract

PURPOSE:To make it possible to join PC plate members with reinforcement joining by a non-welding method. CONSTITUTION:A pair of PC plate members 1-A and 1-B are so erected that horizontal reinforcing bars between members corresponding to a large number of horizontal reinforcing bars 3-A and 3-B between members projected and exposed respectively in the horizontal direction from the joining ends 2-A and 2-B opposed to a pair of PC plate members 1-A and 1-B to be joined are faced to each other in a butting state. The opposite exposing ends are stored in a sleeve 5 as a metal cylindrical body having a U-shaped or a semi-oval section, stored reinforcements are fixed to the inside of the sleeve 5 by a wedge 12 of force-fit into the sleeve, and the horizontal reinforcing bars 3-A and 3-B between members are connected accordingly. After that, concrete is placed between the joining 2-A and 2-B to complete the joining of the PC plate members 1-A and 1-B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining precast reinforced concrete plate members.

[00O2]

2. Description of the Related Art Joining of precast reinforced concrete plate members (hereinafter referred to as PC plate members) such as wall members and floor members is performed by horizontally projecting members which are exposed by horizontally projecting from the facing joint end faces. It has been done by pouring concrete between the joint end faces after joining the. A conventional PC plate member joining method will be described with reference to FIG.

The PC plate members 1-A and 1-B having a pair of joints are installed so that their joint end faces 2-A and 2-B face each other. The end portions of a large number of horizontal member rebars 3-A and 3-B project horizontally from the joint end face of each member, and the exposed end portions of the corresponding horizontal rebar members are butt-shaped due to the above-mentioned installation. opposite. Reinforcing bars 4 are brought into contact between the ends of the opposing reinforcing bars, and the respective ends are welded thereto. After that, concrete is placed between the facing end faces. Since the PC plate member is installed by lowering the member from above to the installation position, at this time, there is a slight gap between both ends of the reinforcing bars so that the protruding and exposed ends of the horizontal reinforcing bars do not collide with each other. Designed to be separated. Therefore, the joining of the exposed ends is performed by the butt joining method.

[0004]

As described above, the conventional P
In the C plate member joining method, the inter-member reinforcing bars are joined by welding. However, welding work is not welcome as it uses fire on site. In addition, the welding work has recently become a bottleneck in the process due to a shortage of welders, and there is an increasing demand for butt joining of non-welding methods for inter-member reinforcing bars.

As a non-welding butt joint method, there is a joint method using a screw joint. However, in order to apply this joint method, the axes of both reinforcing bars must coincide with each other with high accuracy. Since it is very difficult to make the ends of the inter-member rebars face each other with extremely high precision, joining by screw joints cannot be applied. Further, it is complicated because it is necessary to engrave screws on the reinforcing bar.

In view of the above situation, the present invention provides a PC plate member joining method by a non-welding type rebar joining method which can be easily carried out without requiring skill and can easily secure required joining performance. It is intended for.

[0007]

The present invention will be described with reference to FIG. 1 showing an embodiment thereof. The present invention includes (a) the joint end surface 2-
Many members from A and 2-B Horizontal reinforcing bars 3-A and 3
-A pair of precast reinforced concrete plate members 1-A and 1-B in which the end portions of -B project and are exposed are built so that their joint end faces 2-A and 2-B face each other, and The end portions of the corresponding horizontal reinforcing bars 3-A and 3-B are opposed to each other in a butt shape, and (b) the opposed end portion is a sleeve made of a metal tubular body (shown by a dotted line in the figure).
5, and the wedges 12 (shown by dotted lines) are press-fitted through the wedge holes provided in the side wall of the sleeve to fix the ends of the rebars to be accommodated in the sleeve. A method for joining precast reinforced concrete plate members, which is characterized in that: The arrows in the figure indicate the vertical direction for wall members and the horizontal direction for floor members.

The sleeve 5 shown by the dotted line in FIG.
This is a metal tubular body having both ends open, and the reinforcing bars inserted therein can be fixed in the tubular body by wedge press fitting. An example thereof is shown in FIG. This is a sleeve 6 having a U-shaped cross section, which is composed of a pair of side-walls 8-A and 8-B which are juxtaposed and which are substantially flat, and one convex wall 9. There is no wall on the opposite side of the convex wall and there is a side opening. Has become. A plurality of wedge holes 10-A and 10-B are provided on a side wall (referred to as a U-shaped sleeve) along the sleeve axial direction. The wedge holes are provided in pairs so as to face the corresponding positions on both side walls.

The wedge used in the U-shaped sleeve is shown in FIG. The wedge is composed of a set of a wedge 12 and a wedge pad 13, and one surface of both is a flat surface in a sliding relationship.

FIG. 4 shows the state of rebar fixing by the U-shaped sleeve. After inserting the reinforcing bar 14 into the U-shaped sleeve 6, the wedge pad 13 is bridged from the wedge hole 10-A of one side wall 8-A to the wedge hole 10-B of the opposite side wall 8-B. It is preferable to make one end of the wedge pad 13 large so as to serve as a stopper at this time. Then, the wedge 12 is pressed into the wedge holes 10A to 10-B so as to pass through the sleeve so as to slide on the wedge pad. The surface of the reinforcing bar 14 opposite to the side in contact with the wedge is pressure-bonded to the inner surface of the convex wall 9 of the sleeve, and thereby fixed in the sleeve. Opposing horizontal reinforcing bar end pairs are accommodated in the sleeve and are fixed in the sleeve respectively, so that the opposing horizontal reinforcing bars are joined in abutting manner by the sleeve.

Another example of the sleeve is shown in FIG. This sleeve is a sleeve 7 of semi-elliptical cross section, consisting of a pair of side-by-side substantially planar side walls 8-A and 8-B and one convex wall 9 and a generally planar flat wall 11 opposite it. There is. Wedge holes 10-A and 10-B having the same structure as the U-shaped sleeve are provided on the side surface (referred to as a semi-elliptical sleeve). The semi-elliptical sleeve has a configuration in which a flat wall 11 is provided at the position of the side opening of the U-shaped sleeve. The flat wall may be provided over the entire length of the sleeve, or only partially, particularly at the position of the wedge hole.

FIG. 6 shows the state of rebar fixation by the semi-elliptical sleeve.
Shown in. The lower edges of the wedge holes 10-A and 10-B are flat walls 11
The wedge 12 is flush with the inner surface of the wedge and is pressed into the sleeve while being in contact with the inner surface of the flat wall. Therefore, the wedge pad, which was necessary in the case of the U-shaped sleeve, is unnecessary. If the lower edge of the wedge hole is not flush with the inner surface of the flat wall, a wedge contact is required as with the U-shaped sleeve.

When joining the end portions of the horizontal reinforcing bars facing each other, the pair of end portions are accommodated in the sleeve, but in the case of a U-shaped sleeve, the end portions can be accommodated by covering the opposite end portions with a U-shaped sleeve. In the case of a semi-elliptical sleeve, it is first fitted to one of the rebars by loosely fitting it, and after being built, it is slid toward the other rebar to be loosely fitted into both the rebars.
The wedge is press-fitted into the sleeve by a press-fitting machine having a C-shaped arm.

[0014]

The PC board member joining method of the present invention has the following advantages over the conventional joining methods. (A) Joining of horizontal reinforcing bars between members can be performed by a non-welding method. (B) The joining work is simple and can be easily performed by an unskilled person. (C) It is easy to secure the required joining performance. (In the case of welding, the joining performance is greatly affected by the skill level of the operator.)

[Brief description of drawings]

FIG. 1 is a view showing a PC plate member joining method of the present invention.

FIG. 2 is a perspective view of a U-shaped sleeve.

3A and 3B are views showing a wedge, in which FIG. 3A is a side view and FIG. 3B is a front view.

FIG. 4 is a front view showing a state in which a reinforcing bar is fixed in a U-shaped sleeve.

FIG. 5 is a perspective view of a semi-elliptical sleeve.

FIG. 6 is a front view showing a state where a reinforcing bar is fixed in a semi-elliptical sleeve.

FIG. 7 is a diagram showing a conventional PC plate member joining method.

[Explanation of symbols]

 1-A, 1-B PC plate member 2-A, 2-B member joining end surface 3-A, 3-B member horizontal reinforcing bar 4 supplementary bar 5 sleeve 6 U-shaped sleeve 7 semi-elliptical sleeve 8-A, 8-B Side wall 9 Convex wall 10-A, 10-B Wedge hole 11 Flat wall 12 Wedge 13 Wedge pad 14 Reinforcing bar

Claims (1)

[Claims] (A) A pair of precast reinforced concrete plate members having a large number of horizontal reinforcing bar ends protruding from the joint end faces and exposed so that their joint end faces face each other. The end portions of the horizontal reinforcing bars to be opposed to each other in a butt shape, (b) The opposing ends are housed in a sleeve made of a metal tubular body, and a wedge is press-fitted from a wedge hole provided in a side wall of the sleeve. Precast reinforced concrete plate member joining method, characterized in that the end portions of the accommodated reinforcing bars are fixed in the sleeve, and (c) after that, concrete is placed between the facing end surfaces.